Locomotive valve-gear



(No Model.) 2 sheets -sheet 1.

W. J. LEWIS.

LOGOMOTIVE VALVE GEAR.

No. 355,770. Patented Jan. 11, 18 87.

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(No Model.) w -W.- J. LEWIS.

LOOOMOTIVB VALVE GEAR.

No. 355,770. Patented Jan.'11,"1887.

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Y NITED STATES PATENT OFFICE.

WALLACE JAMES LEwIs, OF TYLER, TEXAS,

LOCOMOTIVE VALVE-GEAR.

SPECIFICATION forming part of Letters Patent No. 355,770, dated January I1; 1887.

Application'filed April 28, 1886. Serial No. 200,442. (No model.)

To all whom it may concern.-

Be it known that I, WALLAoE JAMES LEwIs, of Tyler, in the conntyof Smith and State of Texas, have invented a new and Improved Locomotive Valve-Gear, of which the following is a full, clear, and exact description.

The object of my invention is to provide new and useful improvements in the locomotive valve-gear for which Letters Patent No.

IO 331,799 were granted to me December 8,1885. r The invention consists of a centrally-pivoted lever, which is operated from the cab of the locomotive, and of slotted reversing-arms which are actuated by the same, and are connected I 5 to the valve-rod.

The invention also. consists of various parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all-the figures.

Figure 1 is a plan view of my improvement. Fig. 2 is aside elevation of the same. Fig. 3 is an end elevation of the same, parts being in section.

The main rocker-shafts A A extend across the frame of the locomotive, and one end of each of the shafts A is provided with a downwardly-projecting arm, B, which is connected by the rod 0 with the cross-head D of the 10-' comotive. In line with the arm B is the upwardly-extending arm E, which connects by the rod F with the valve-rod lever G, pivoted to the link G on the valve-rod H. Each of the rockershafts A-is alsoprovided with the downwardly-projecting arm I, which connects by the link J with the arm K, attached to the 4,0 rocking shaft K. Each of the rocking shafts K is operated from the cross-head D on the opposite side of the locomotive-frame. The arm K of the rocking shaft K is connected by V the link M with the block N, sliding in a recess, O, of the reversing-arm O, which is piva otally connected at its end 0 to the frame of the locomotive, the other end being provided a with a rotating block, 1?, having a square aperture, 1?, into which fits one end of the lever 5o or rocking beam Q, pivotally connected at its center to the locomotive-frame and extending across the same. The rocking beam Q is conheated by a link, R, (see Fig. 1,) with a bellcrank attachment which is operated from the cab of the locomotive by the ordinary reversing-lever and reach-rod.

On the pin which connects the link M with the block N is fulcrumed a link, S, which connects with the horizontally-sliding arm T, fastened to the lower end of the valve-rod lever G.

v The arms K and K on' the rocking shaftK arms 0 are parallel with each other, it brings the longitudinal central line through the arms to the center of the rocker-shafts K, and the slides T then have no motion; but when the arms 0 are moved either way from the center of the rocking shaft K they impart motionto the slides T, which, in combination with the movement derived from the valve-levers G,

through the medium of the main rocker-shafts A, gives a perfect motion to the valves.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. In a valve-gear, the combination, with the crank-shafts A A, having the arms B E I, and the rods 0, connecting the arms B and the cross-heads, of the rocking shafts K, operated from the cross-heads, the arms K on the rocking shafts K, the links J, connecting the arms I and K, the arms K of the rocking shafts K, the reversing-arms O, pivoted at O and have ing sliding blocks N, the links M, connecting the said blocks and the arms-K means for operating the reversing-arms, the valve-rod lever G, the sliding arm T, the link S, connecting the link M and lever G, and the rods F, connecting the arms E E and levers G G, substantially as and for the purpose set forth.

2. In a valve-gear for locomotives, a pivoted reversing-arm having a recess and being fulcrumed on one end, in combinationwith a rotating block fitted in one end of the revers- 4. The pivoted lever Q, the reversing-arms ing-arm, and engaging one end of the pivoted O, the links M and S, and the rocking shafts lever operated from the cab of the locomotive, K, having the arms K and K, in combination substantially as shown and described. 7 with the main rocking shafts A, having the 5 3. In a valve-gear for locomotives, a pivarms B and E, and the connecting-rods Oand r5 oted lever, Q, operated from-the cab of the 10- F, substantially as shown and described.

eomotive, and the pivoted reversing-arms O, I WALLACE JAMES LEWIS. in combination with the links M and S, and Witnesses: the rocking shafts K, having the arms K and E. J. TILLMAN,

IO K, substantially as shown and described. 1 THos, R. REYNOLDS. 

